Unity Scene --> Unreal 5.4

I’m rather surprised after the Unity “fiasco” that there are not more ways to export scenes (excluding scripts and special effects and other than “standard” shaders) to Unreal. If you can export the scenes or asset overviews, you don’t have to export them one-by-one. I’ve seen several conversion videos, but those are mostly done with low-poly assets. Most searches show “Unreal convert to Unity” and not the other way around.

I have years of great assets from Unity. Is there any way to convert those non low-poly scenes (without having to export one-by-one) to Unreal?

Most likely not. The two engines are way to different. The best that can be done is transferring mesh locations, and converting prefabs to blueprints, but there will still have to be lots of manual work done in terms of shading and lighting.